Fire-box lining.



W. L. MERSFELDER.

FlRE BOX'LINING. APPLICATION FILED APR. 6. 191 7.

1,250,200. Patented Dec. 18,1917.

1 (June/Mex M/ QALM/ war/f: 506a? atboznmf ME STATE TS PATENT OFFICE.

WILLIAM L. MERSFELDER, 0F DETROIT, MICHIGAN, ASSIGNOR TO DETROIT STOVEWORKS, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

FIRE-BOX LINING.

Specification of Letters Patent.

Patented Dec. 18, 1917.

To all whom it may concern:

Be it known that I, WILLIAM L. MERS- rnnnnn, a citizen of the UnitedStates of America, residing at Detroit, in the county of Wayne andStateof Michigan, have invented certain new and useful Improvements inFire-Box Linings, of which the following is a specification, referencebeing had therein to the accompanying drawings.

The invention relates to cooking-stoves, ranges or other appliances, andmore particularly that type in which the fire-box is arranged in frontor at the side of the oven. It is the object of the invention to providemeans for preventing the overheating of the oven adjacent to thefire-box and at the same time to pre-heat the air which is introducedand distributed to the ignited coal within the fire-box so as to securebetter and more nearly smokeless combustion.

In the drawings:

Figure 1 is a cross-section through a portion of the stove to which myimprovements are applied;

Fig. 2 is a front elevation of the linerplate; and

Fig. 3 is a plan view.

A is the fire-box, and B is the oven of a cooking-stove or range of theusual type. C is a liner-plate for the rear side of the fire-boxadjacent to the oven B. This plate is provided with lugs D forseparating the same from the oven wall and at the top with anoverlapping flange E for engaging the top F of the oven. The plate isalso provided at a plurality of points with passages G opening to therear at the top and beneath the flange E, and opening to the front atpoints H, thereby forming downturned air passages. The front of theplate C is also provided with a series of laterallyextending grooves I,each forming a succession of arcs described about points substantiallymidway between the points H and I either communicating with orapproaching the passages G at the ends of said arcs. These grooves willdistribute the air which passes from the back of the plate C throughoperation, the chimney draft will create sufficient difference inpressure to cause the air from the ash-pit section to pass upwardbetween the plate C and the oven wall and then downward through thepassages G and distributing channels I. During this movement the heatimparted to the plate from contact with the fuel will be partiallyabsorbed by the air current, thereby avoiding overheating of the oven,and at the same time the air is raised in temperature, causing a hot airblast. Thus when the air is finally commingled with the fuel gasessmokeless combustion will be produced. The advantageous feature of theconstruction is that the air passages will not become clogged eitherwith fuel or ashes. This is for the reason that'the downturned passagesG are protected by the front wall or bafl'le J, and, as before stated,the grooves are of a cross-section which will prevent lodgment of fueltherein. As a consequence a very uniform distribution of the heated airis obtained, which will maintain uniform combustion.

WVhat I claim as my invention is In a stove, the combination with afirebox and oven section, of a liner for said fire-box spaced from theoven to form an air chamber and having a plurality of relatively smallinclined. air passages extending therethrough opening at their lowerends into the fire-box and at their upper ends into said air chamber,the front face of said liner being formed with a series of groovesextending in downward curved arcs between points vertically alined withsaid air passages and adapted to deflect air discharged through saidpassages laterally along the surface of said plate.

In testimony whereof I aflix my signature.

WILLIAM L. MERSFELDER.

Copies of this patent may be obtained for five cents each, by addressingthe "Commissioner of latents, Washington, D. 0.

